18712805941 has 4 divisors (see below), whose sum is σ = 19169215884. Its totient is φ = 18256396000.

The previous prime is 18712805927. The next prime is 18712805987. The reversal of 18712805941 is 14950821781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463497841 + 18249308100 = 21529^2 + 135090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18712805941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18712805891 and 18712805900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712805341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228204910 + ... + 228204991.

It is an arithmetic number, because the mean of its divisors is an integer number (4792303971).

Almost surely, 2^18712805941 is an apocalyptic number.

It is an amenable number.

18712805941 is a deficient number, since it is larger than the sum of its proper divisors (456409943).

18712805941 is an equidigital number, since it uses as much as digits as its factorization.

18712805941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456409942.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 18712805941 in words is "eighteen billion, seven hundred twelve million, eight hundred five thousand, nine hundred forty-one".